STAC9271 datasheet(193/223 Pages) IDT

193 / 223 page

STAC9271/9272/9273/9274

10-CHANNEL HIGH DEFINITION AUDIO CODEC

PC AUDIO

IDT™

10-CHANNEL HIGH DEFINITION AUDIO CODEC

193

STAC9271/9272/9273/9274 V 1.0 MARCH2007

IDT CONFIDENTIAL

6.31.8. VolumeKnob VCSR0

6.32. InPort0Vol Node (NID = 0x18)

6.32.1. InPort0Vol WCap

Table 479. VolumeKnob Cntrl

Command Response Format

Bit

Bitfield Name

Reset

Description

[31.:8]

Rsvd

0x0

Reserved

[7]

Direct

0x0

Direct = 1 causes the volume control to directly control the

hardware volume of the slave amps. Direct = 0 causes

unsolicited responses to be generated.

[6.:0]

Volume

0x7F

Volume, specified in steps of amplifier gain

Table 480. VolumeKnob VCSR0

Command Verb Format

Verb ID

Payload

Response

Get

FE0

See bitfield table.

Set1

7E0

See bits [7:0] of bitfield table.

0000_0000h

Table 481. VolumeKnob VCSR0

Command Response Format

Bit

Bitfield Name

Reset

Description

[31.:4]

Rsvd

0x0

Reserved

[3]

Continuous

0x1

Allow continuous incrementing/

decrementing of the volume knob value.

[2.:0]

Rate

0x0

Volume knob update rate, for continuous

mode and de-bouncing (0.7 = 2.5.20 Hz, in

increments of 2.5 Hz)

Table 482. InPort0Vol WCap

Command Verb Format

Verb ID

Payload

Response

Get

F00

See bitfield table.

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